Acell in the leaf of a green plant performs both photosynthesis and cellular respiration, often at the same time. which statement best describes how these processes are related to each other?

a. products of one process are used as some of the reactants for the other processes.

b. both processes produce carbon dioxide.

c. both processes require energy directly from the sun.

d. thermal energy from one process is used as the energy source for the other process.